Cod sursa(job #1291913)
Utilizator | Data | 13 decembrie 2014 15:00:23 | |
---|---|---|---|
Problema | Cautare binara | Scor | 0 |
Compilator | cpp | Status | done |
Runda | Arhiva educationala | Marime | 1.71 kb |
/*http://www.infoarena.ro/problema/cautbin*/
#include <iostream>
#include <fstream>
using namespace std;
int v[100010],n,z,x,m,st,dr,i;
int main()
{
ifstream f("cautbin.in",ifstream::in);
ofstream g("cautbin.out",ifstream::out);
f>>n;
for(i=1;i<=n;i++)
f>>v[i];
f>>m;
for(i=0;i<m;i++)
{
f>>z>>x;
if(z==0)
{
st=1;
dr=n;
while(st<dr)
{
m=(st+dr)/2;
if(x>=v[m])
st=m+1;
else dr=m;
}
st--;
if(v[st]==x) g<<st<<'\n';
else g<<-1<<'\n';
}
if(z==1)
{
st=1;
dr=n;
while(st<dr)
{
m=(st+dr)/2;
if(x>=v[m])
st=m+1;
else dr=m;
}
st--;
g<<st<<'\n';
}
if(z==2)
{
st=1;
dr=n;
while(st<dr)
{
m=(st+dr)/2;
if(x>=v[m])
dr=m-1;
else st=m;
}
st++;
g<<st<<'\n';
}
}
return 0;
}